On Jul 15, 12:13*am, wrote:
How much force does a common shop vise develop in its jaws?

That's sort of like asking how fast a common car goes... Different
vices have different thread pitch, different handle lengths, and
different (stronger/weaker) humans operating them. So, unless an
answer like "somewhere between 500 and 20,000 pounds" satisfies your
curiosity, you may be disappointed.

You should be able to calculate (roughly) the force your press will
generate using the thread pitch, length of the handles and how much
force YOU can apply to the handles (which may be the hardest to
measure)...assuming it's strong enough to hold together.